Bài kiểm tra một tiết chương I môn: hình học

Trường THCS Vĩnh Quang Bài kiểm tra một tiết chương I
 Môn: Hình học
 Họ và tên : .........................................................................................
 Lớp : ........................

Điểm




Lời nhận xét của giáo viên
Đề bài
A/ Trắc nghiệm khách quan:
Bài 1: Hãy chọn dấu x vào ô trống:
Câu
Nội dung
Đúng
Sai
1
Hai đường thẳng: a, b phân biệt cùng song song với đường thẳng thứ 3 thì: a //b 


2
Hai đường thẳng song song là 2 đường thẳng phân biệt không cắt nhau


3
Hai đường thẳng cắt nhau thì vuông góc


4
Nếu 2 đường thẳng a, b cắt đường thẳng c mà trong các góc tạo thành có một cặp góc trong cùng phía bù nhau thì a //b


Bài 2: Khoanh tròn định lí mà em cho là đúng.
A. 	 a ^ c
	gt:	b ầ c
 Kl:	a //b
“ Hai góc đối đỉnh thì bằng nhau”
B/ Tự luận.
 Bài 1 a) Vẽ đường trung trực của đoạn thẳng AB dài 5 cm
	 b) Vẽ tia phân giác của góc x0y = 900
 Bài 2: Cho đt: “Nếu 2 đường thẳng cùng vuông góc với đt thứ 3 thì chúng song song với nhau”.
Hãy vẽ hình và ghi gỉa thiết kết luận của định lí.


a
b
A
B
O
300
450
 Bài 3: Cho hình vẽ
Biết: a //b
 = 300; = 450
Tính số đo góc AOB ?
Bài làm phần tự luận
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